111012021221 has 8 divisors (see below), whose sum is σ = 117053842080. Its totient is φ = 104990108688.

The previous prime is 111012021143. The next prime is 111012021229. The reversal of 111012021221 is 122120210111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111012021221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111012021196 and 111012021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012021229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4965626 + ... + 4987931.

It is an arithmetic number, because the mean of its divisors is an integer number (14631730260).

Almost surely, 2^111012021221 is an apocalyptic number.

It is an amenable number.

111012021221 is a deficient number, since it is larger than the sum of its proper divisors (6041820859).

111012021221 is an equidigital number, since it uses as much as digits as its factorization.

111012021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9954163.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111012021221 its reverse (122120210111), we get a palindrome (233132231332).

The spelling of 111012021221 in words is "one hundred eleven billion, twelve million, twenty-one thousand, two hundred twenty-one".